Missing Authentication Flaw in Fireware OS FireCluster by WatchGuard
CVE-2026-93865

9.2CRITICAL

Key Information:

Vendor

Watchguard

Status
Fireware Os
Vendor
CVE Published:
27 October 2026

Badges

👾 Exploit Exists

What is CVE-2026-93865?

A vulnerability in WatchGuard's Fireware OS FireCluster synchronization daemon permits remote, unauthenticated attackers to execute privileged system-level actions. This can be exploited by sending specially crafted requests to the FireCluster management IP, provided that the clustering feature is enabled. Organizations should ensure proper security measures to mitigate risks associated with this issue.

Affected Version(s)

Fireware OS Default 2025.1 < 2026.4

Fireware OS Default 12.0 < 12.12.4

Fireware OS T15/T35 12.0 < 12.5.22

References

https://psirt.watchguard.com/CVE-2026-93865
vendor-advisory

CVSS V4

Score:
9.2
Severity:
CRITICAL
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
Physical
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

Credit

WatchGuard AI Security Research
.